Download or read book Traitement d un effluent gazeux humide par adsorption r action chimique et catalyse written by Lionel Garin and published by . This book was released on 2005 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude effectuée porte sur la mise au point d'un système compact de traitement d'un affluent gazeux humide faiblement concentré en dioxyde d'azote et en monoxyde de carbone. L'objectif est le traitement de sources diffuses de pollution afin d'assurer dans de petits volumes une qualité d'air optimale. Pour cela, nous avons choisi des procédés basés sur l'absorption, l’absorption et/ou les réactions chimiques et mis en œuvre en lit fixe. Le temps de séjour du gaz est de quelques dizaines de ms et sa température proche de celle de l'ambiance.Différents matériaux absorbants et catalyseurs, ont donc été étudiés sur deux montages expérimentaux : - Un banc d'essais permettant de tester des volumes de matériaux inférieurs à 0,06 L en maîtrisant les différents paramètres. L’effluent gazeux y est reconstitué par mélange d'air, de CO et de NO2. L'humidité est générée par barbotage du gaz dans de l'eau ou par injection directe de vapeur; - Un prototype en vraie grandeur (6 à 10 L de matériaux) sur lequel est effectué le traitement de l'efffluent gazeux réel. Il apparaît que le produit le plus intéressant pour le traitement du dioxyde d'azote est un charbon actif imprégné d'hydroxyde de potassium. L'oxydation catalytique du monoxyde de carbone dans ces conditions peut être effectuée par un catalyseur ternaire Pt-Pd-SnO2/AI2O3. L'influence des différents paramètres (humidité, temps de séjour, concentration, température) sur l'activité de ces deux matériaux a été étudiée. La neutralisation du NO2 sur le charbon actif nécessite une certaine humidité du gaz (> 40% à 40°C). Une conversion du NO2 en NO à faible humidité ou pour des temps de travail importants a été observée. La capacité de fixation du NO2 sur le charbon actif imprégné de KOH a été mesurée. La détermination des mécanismes de neutralisation ainsi qu'un modèle permettant d'estimer l'efficacité initiale sont proposés. En ce qui concerne le catalyseur, les paramètres cinétiques d'oxydation du monoxyde de carbone présent dans de l'air sec ou humide ont été déterminés. Une réduction du dioxyde d'azote en présence de monoxyde de carbone (NO2 + CO → NO + CO2) a aussi été observée. Pour valider ces résultats, des essais de longue durée ont été menés sur le prototype et ont permis de mettre en évidence différents problèmes relatifs à la mise en œuvre des matériaux retenus.
Download or read book Etude et analyse de deux dispositifs industriels de traitement d effluents gazeux acide par voie semi humide et tude d un proc d d limination du mercure gazeux par adsorption sur charbon actif written by Fatiha Anki and published by . This book was released on 1998 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lors du processus d'incinération de déchets, les polluants gazeux présents dans les fumées tels que l'acide chlorhydrique et le mercure doivent être éliminés avant d'être rejetés dans le milieu extérieur. Une étude menée sur les fumées d'usines d'incinération de déchets ménagers (température des fumées : 200-250°C) ou de déchets industriels spéciaux (t = 350-400°C), teste quatre réactifs alcalins dans deux procédés de traitement des fumées par voie semi-humide, en vue de neutraliser l'acide chlorhydrique. Les réactifs sont la chaux hydratée, la soude, le bicarbonate et le carbonate de sodium. Les solutions alcalines, pulvérisées en fines gouttes, absorbent et neutralisent ainsi HCl, conduisant à la formation d'un résidu solide. En parallèle a ce travail, une étude de l'adsorption du mercure gazeux sur un charbon actif à base de noix de coco est réalisée sur un réacteur pilote a lit fixe. La fumée d'incinération prélevée (débit 2000 l/h) passe dans le dispositif à des températures variant entre 150 et 200°C. Différentes durées d'exposition sont testées pour déterminer la saturation du charbon actif par le mercure. Un modèle d'évaporation et un modèle d'absorption de HCl sont appliqués et représentent de façon satisfaisante les évolutions expérimentales des taux d'absorption de HCl en fonction du débit du liquide ou du facteur stœchiométrique. Un modèle d'adsorption du mercure par le charbon actif est appliqué pour la détermination du coefficient de transfert global et de la constante d'équilibre d'adsorption.
Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Download or read book Karen s New Bike Baby Sitters Little Sister 62 written by Ann M. Martin and published by Scholastic Inc.. This book was released on 2016-05-31 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! Yikes, My Bike! Karen is learning all about bike safety in school. She is even going to enter a bike-a-thon. But Karen’s bike is too small for her. So with Daddy’s help, Karen buys a new bike. Then Karen’s new bike is stolen. Can Karen catch the thief and get her bike back?
Download or read book Management of Radioactive Wastes from the Nuclear Fuel Cycle written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrochimica written by International Atomic Energy Agency and published by . This book was released on 1977 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic matter and soil productivity; Turnover of plant residues; Mineralization of organic compounds; Dynamics of organic forms of nitrogen; Nitrogen economy; Biodegradation of organic matter; Biochemical transformation of organic matter; Bitumens in soil organic matter; Characterization of humic acids; Carbon dating; Modern techniques and their implact on soil organic matter research; Sludge; Soil organic matter components and plant metabolism; Interaction between agrochemicals and organic matter; Peat.
Download or read book Organochlorine Insecticides written by F. Moriarty and published by . This book was released on 1975 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monitoring persistent organic pollhitants; exposure and residues; variationin the intake and elimination of pollutants; the role of the thy roid in the production of sublethal effec by organochlorine insecticides and polychlorine insecticides on amimal populations; persistent percides an economic and legal analysis.
Download or read book How to Design Wastewater Systems for Local Conditions in Developing Countries written by David M. Robbins and published by IWA Publishing. This book was released on 2014-03-15 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a practical handbook providing a step-by-step approach to the techniques used for characterizing wastewater sources and investigating sites where collection, treatment and reuse/disposal technologies will be installed. It is intended to help enable local implementation of on-site and decentralized wastewater management system (DWMS)for wide scale use in development settings. How to Design Wastewater Systems for Local Conditions in Developing Countries helps local service providers and regulatory officials make informed decisions through the use of tools, checklists and case studies. It includes a link to a web based community of on-site and decentralized wastewater professionals, which contains related tools and case studies. This handbook serves as a reference for training classes, certification programs, and higher education programs in civil and sanitary engineering. There is an increasing interest on the part of local government officials and private sector service providers to implement wastewater treatment systems to solve sanitation problems. The model presented in this handbook promotes activities that first generate data related to source and site conditions that represent critical inputs, and then applies this information to the technology selection process. Matching the most appropriate technologies to the specific needs of the wastewater project is the key that leads to long term sustainability. How to Design Wastewater Systems for Local Conditions in Developing Countries is an invaluable resource for public sector decision makers and private sector service providers in developing countries. It is also a useful text for students at engineering colleges in developing countries interested in taking a class that teaches the methods of decentralized wastewater management system (DWMS) development.
Download or read book Utilization of Fish Waste written by Raul Perez Galvez and published by CRC Press. This book was released on 2013-05-21 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: The shortage of marine resources calls for the implementation of new technological processes for providing a better utilization of waste and by-products from fisheries and fish processing activities. Most of these by-products are currently used as raw materials for animal feed. It is estimated that their utilization in human foodstuffs, nutraceutic
Download or read book Applied Mineralogy in the Mining Industry written by W. Petruk and published by Elsevier. This book was released on 2000-11-29 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Techniques of performing applied mineralogy investigations, and applications and capabilities of recently developed instruments for measuring mineral properties are explored in this book intended for practicing applied mineralogists, students in mineralogy and metallurgy, and mineral processing engineers. The benefits of applied mineralogy are presented by using in-depth applied mineralogy studies on base metal ores, gold ores, porphyry copper ores, iron ores and industrial minerals as examples. The chapter on base metal ores includes a discussion on the effects of liberation, particle sizes and surfaces coatings of Pb, Cu, Fe, Ca and So4- on the recoveries of sphalerite, galena and chalcopyrite. The chapter on gold discusses various methods of determining the quantities of gold in different minerals, including 'invisible' gold in pyrite and arsenopyrite, so that a balance of the distribution of gold among the minerals can be calculated. This book also discusses the roles of pyrite, oxygen, moisture and bacterial (thiobacillus ferrooxidans) on reactions that produce acidic drainage from tailings piles, and summarizes currently used and proposed methods of remediation of acidic drainage.
Download or read book Compendium of Sanitation Systems and Technologies written by Elizabeth Tilley and published by . This book was released on 2014 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encapsulations written by Alexandru Grumezescu and published by Academic Press. This book was released on 2016-05-27 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encapsulations, a volume in the Nanotechnology in the Agri-Food Industry series,presents key elements in establishing food quality through the improvement of food flavor and aroma. The major benefits of nanoencapsulation for food ingredients include improvement in bioavailability of flavor and aroma ingredients, improvement in solubility of poor water-soluble ingredients, higher ingredient retention during production process, higher activity levels of encapsulated ingredients, improved shelf life, and controlled release of flavor and aroma. This volume discusses main nanoencapsulation processes such as spray drying, melt injection, extrusion, coacervation, and emulsification. The materials used in nanoencapsulation include lipids, proteins, carbohydrates, cellulose, gums, and food grade polymers. Applications and benefits of nanoencapsulation such as controlled release, protections, and taste masking will be explained in detail. Includes the most up-to-date information on nanoencapsulation and nanocontainer-based delivery of antimicrobials Presents nanomaterials for innovation based on scientific advancements in the field Provides control release strategies to enhance bioactivity, including methods and techniques for research and innovation Provides useful tools to improve the delivery of bioactive molecules and living cells into foods
Download or read book In Situ Gelling Polymers written by Xian Jun Loh and published by Springer. This book was released on 2014-10-01 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the research involving in situ gelling polymers and can be used as a guidebook for academics, industrialists and postgraduates interested in this area. This work summaries the academic contributions from the top authorities in the field and explore the fundamental principles of in situ gelling polymeric networks, along with examples of their major applications. This book aims to provide an up-to-date resource of in situ gelling polymer research.
Download or read book Wood Adhesives written by Antonio Pizzi and published by CRC Press. This book was released on 2011-01-07 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wood adhesives are of tremendous industrial importance, as more than two-thirds of wood products in the world today are completely or partially bonded together using a variety of adhesives. Adhesive bonding offers many advantages over other joining methods for wood components, and there has been a great deal of R& D activity in devising new wood adhesives or improving the existing ones. The modern mantra in all industrial sectors is: "think green, go green," which has attracted much attention in the wood adhesive industry. Therefore, there is also a lot of research activity in synthesizing environmentally benign and human-friendly wood adhesives. This book is divided into four parts: Part 1: Fundamental Adhesion Aspects in Wood Bonding; Part 2: Synthetic Adhesives; Part 3: Environment-friendly adhesives; and Part 4: Wood Welding and General Paper. It addresses many different types of wood adhesives, as well as bonding (welding) of wood components without adhesives, a more recent development. The information contained in this book is valuable for individuals engaged in all aspects of wood adhesion and adhesives and, hopefully, will inspire new ideas in wood adhesives, a topic of vital industrial importance.
Download or read book Physical Chemical and Thermal Technologies written by Godage B. Wickramanayake and published by . This book was released on 1998 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: - Thermal Desorption- In Situ Thermal Technologies- Plasma Technologies- In Situ Steam Processes- Soil Vapor Extraction/Multiphase Extraction- Enhancements to Pump-and-Treat-Systems- Groundwater Circulating Wells- Air Sparging- Dehalogenation Technologies- Oxidation Technologies- Photo-, Electro-, and Catalytic Mechanisms.
Download or read book Disposal of Radioactive Wastes Into the Ground written by and published by . This book was released on 1967 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
